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These tanks look awesome! They are right up the alley for me since I have to get someone to put my stuff together. Might have to get one of these for my new plane that's getting reading to be put together. Wish I hadn't already ordered the 32oz dubro tank
Great Design guys! |
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United States, PA, Ridgway
Joined Jun 2008
2,571 Posts
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Just wanted to do a quick low-fly-by and clear up any possible confusion...I am going to order two of these tanks for my next project. I like the design and the concept. The "only" point of difference between myself and the designers/manufacturers is that I will have the two tanks connected in series, and not parallel. If I run into the same issues that this team has in the past, I will work the issue(s) to a positive conclusion...and post the results...remaining in a series configuration.
My hope is that everyone understands that this is a quality product, period. I just choose to use it in a slightly different way... To the 4titude team, thank you!! |
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Smacka are you using these tank to feed fuel to a 350 chevy ? If not then I just don't see how you can pull enough fuel from the tanks fast enough for the Tee to have the problem you are talking about. Sure if you pull fuel thru a Tee fast enough it will do what you are saying for sure,,,,,,, but a 170 or smaller engine just is not going to do that.
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United States, PA, Ridgway
Joined Jun 2008
2,571 Posts
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fwiw...I am a self-retired aerospace engineer with a strong background in hydraulics, pneumatics and electronics. Not trying to put myself up on a pedestal...just validating that I am not just blowing smoke to hear my gums rattle I like your analogy...it's funny |
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There is absolutely no doubt these are GREAT!!!!!!! Take them out of the package and put them in your plane and it's DONE!!!!! Can't ask for anything better!!! Good job, BIG BIRD!!!!
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After 5 flights with my new Extra, the stock dubro tank leaked and ate the foam on my hatch. I instantly ordered the 4titude tanks and have been in love with them since. Easy set up, lighter, much more time in the air, and I am not worrying about fuel leaks to eat up my foam. In a nutshell.... Jason has spent alot of time designing and testing this product before he made it available to us. If I didnt trust his opinion and his product, I would never put it in my airplanes. I've seen these tanks in tons of planes at fly ins, and never heard one bad response from anyone who has used them. |
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I made my own fiji tank and a vitamin water but I just wasn't happy with the fittings I used.
Started pricing up some new fittings and after considering the cost I figured I might as well buy one of these tanks. Very happy with it. Easy install and forget about it. |
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United States, PA, Ridgway
Joined Jun 2008
2,571 Posts
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*smiles* I get the impression there are quite a few people that feel I am picking on Jason and his product. couldn't be further from the truth. I prefer to use the twin tanks in series and have no doubt it will work. If others prefer a parallel arrangement, please feel free to have at it. I hope it continues to serve you well. As an engineer, I see flaws in that strategy. That's all...no good guys, no bad guys
I will give you a hint at where I am headed with my bench test. When these tanks are arranged in a series setup, the second felt filter located in tank 2 is not necessary (just a weighted clunk), and is very likely the the "smoking gun" that is causing Tank 1 to swell on fill up and to collapse on itself while trying to empty the system of fuel. Why? Because in series you essentially double the pressure drop across the filtration in the system, making it more difficult to move fuel through the system in both directions. The faster you try to fuel up or remove fuel from the system, the higher the back pressure will go, further adding to the problem. Step one is going to involve duplicating the problem Jason was having in series. Once I show that yes, the problem exist, then I will remove the felt filter from Tank 2 and repeat the fill and empty process. I fully expect the problem to go away and to have a very happy series system Once that is complete, I will have a look at the parallel setup...but to be honest, there is a BIG risk that air can be sucked into the carbs. With a series system, Tank 1 is never exposed to air until Tank 2 is completely empty. That makes it 50% less likely to induce air into the system, and ultimately the carb(s). Now, noteworthy is the the "worst case" scenario in the parallel setup is that your carb will start to blurble and "maybe" the engine will cut out. If you are flying IMAC, you land the plane. If you are in a 3D hover close to the ground, you lose your bird if the engine cuts out... One of my fears with a parallel setup, as already stated is cavitation. Another is uneven draw over time due to contamination. We have filters in our tanks to capture any errant particulates that may be roaming around in our fuel cans, etc...Well, as one filter starts to "clog" more or less that the other filter (with particulates), then the draw from the tanks will become uneven. As soon as one tank depletes before the other, there will be a rush of air into the carb and it is game over. If you opt to use a parallel setup, please...please...please be diligent about changing the filters in your tanks "early and often" to preclude this from happening...again, I will simulate uneven clogging of filters and post the results so you can clearly see the air being sucked into the system... I will video tape all of my efforts and post the results once complete |
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So guys the (2) 32oz tank setup is a temporary setup until Jason gets his molds made for the larger single tanks. But I do like the two tank setup. Would I prefer one? Sure but given what we have these are fitting the bill! It may come down to a fit issue to for some with the (2) 32 oz tanks also. From my last flights on this setup at the Rolla Flyin they worked great and for some reason guys are digging them! Oh and by the way I flew IMAC at the JR Challenge with Dave a few weeks ago never had a burp or any fuel starvation on up lines. Oh and I fly 3D too, still no problems. It's funny how you choose to ignore the fact that Andrew posted that his setup worked great, Mine works great and several other guys that bought dual tank setups that do not know Jason at all posted on here. I can do this all day but I guess some will never let it die! Shake-N-Bake! Dave, I bet Smacka likes to use the old six shooter hand crank pump. I don't have that much time, what about you? |
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United States, PA, Ridgway
Joined Jun 2008
2,571 Posts
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Thanks Bryan...I appreciate you lashing out and trying to make me out to be some jackazz just starting trouble. Heaven help anyone who has a different thought than you. Grow up, man!
As stated, Andrews setup works great for him because he is drawing from each parallel tank separately (TWO CARBS)...but you do not get all into that book learning stuff because engineers are just a bunch of guys that sit around trying to figure out how to make your life miserable... I refuse to comment on your other crap... |
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My complaint re: smacka's post is he is talking about a sytem he hasnt even seen. Once he has tried this product, he will be on board with what we are talking about. Great product, Great service. If guys want to run them in series, and use a 6 shooter hand crank, more power to them. If guys want to run them with T's, more power to them. Me personally for what its worth: I will do what Jason (the Manufacturer) recommends. With over 1 year of product research in his XFC plane with no problems and his up lines and down lines and 3D lines just a little bit harder than my lines. (NOT MUCH) My recommendation to anyone wanting to run the 2) 32s is PM or Call Jason. He definately knows his stuff and he will tell you the truth and give you the best advice. For a limited time only: Buy 2) 4titude tanks and get a Fig Newton Sticker for your windshield???? |
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BZ, by using the six shooter you can save approximately $.00001 per crank over using a Jersey Models Rig. You can also accurately figure the exact usage of fuel per flight by figuring the coefficient of the number of cranks until the tank is empty, therefore you can figure if you have the correct air to fuel ratio on your carb. But I don't know how your going to figure that info if you happen to have the DA EFI.... Maybe we can be enlightened, you think???
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